Article ID: 286562 - View products that this article applies to.
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After you install the free version of Pretty Good Privacy version 7.03, you may be unable to browse the Internet or connect to an IP-based network. When you try to establish a Dial-Up Networking or RAS connection, you may receive the following error message:
When you try to start PGPTray and PGPKey, you may receive the following error message:
Unable to Negotiate Connection
Cannot establish connection with the PGP SDK service.
The PGPDisk application could not start because: "PFLError #-11939."
This issue can occur because Pretty Good Privacy 7.03 is not compatible with Microsoft Windows XP.
To resolve this issue, reset TCP/IP in Windows XP. For more information about how to reset TCP/IP in Windows XP, click the following article number to view the article in the Microsoft Knowledge Base:
299357If resetting TCP/IP does not resolve this problem, run System Restore. To run System Restore, follow these steps:
(http://support.microsoft.com/kb/299357/ )How to reset Internet Protocol (TCP/IP) in Windows XP
Note that if you uninstall Pretty Good Privacy 7.03, the issue is not resolved because the program uninstalls the TCP/IP stack, and the TCP/IP stack does not support manual reinstallation.